Gallery, Projects and General > How do I??

Anyone a Mountain Bike Expert?

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Sid_Vicious:
Think of the way the pedals go thats the tightening way of the treads

awemawson:
I got the one on my wife's bike off using 3 MT chuck removal wedges - worked a treat - seem to remember mentioning it fairly recently on the forum:

here you are - reply #10

http://madmodder.net/index.php/topic,11047.msg128285.html#msg128285

Arbalist:
This page is pretty good for crank/BB info and has a picture of some of the different Bottom Brackets showing how much more rigid the splined ones are.

http://www.sheldonbrown.com/tooltips/cotterless.html

krv3000:
years a go when I was a lad bikes had a oiling point on the wheel hubs and the bottom bracket unfortunate manufactures have   dun a way with them so you ether scrap the bike or by new bearings all bearings on bikes was cup and cone with sepret ball bearings just may bit of rant     

sparky961:
I got around to figuring out what I needed to measure tonight, in order to figure out what I need to buy. :)

I got 68mm width for the tube that's part of the frame (confusingly referred to as "the bottom bracket", in addition to the bearing assembly itself) and 122.6mm for the axle length.  It seems like there's a few mm of leeway on the length of the axle so I'm not splitting hairs with the measurements.  It's hard to throw away a few decimal places when you regularly work with 10ths.

Since receiving the suggestion of MEC for parts, I've been putting together an order of a bunch of outdoor things plus the bike components.  I've tentatively settled on the following bottom bracket as being a reasonable replacement that should keep me going for a few years without breaking the bank.  Though there may be better designs there's no reason for me to replace the cranks, pedals, or chainring(s) at this point.  So, instead of changing things I'll just replace with a working part.  Hopefully "sealed" cartridge actually means it keeps the water out.

http://www.mec.ca/product/5021-557/shimano-alivio-bb-un26-68x122mm-eng-square-tapered/?q=bottom%2Bbracket%2Bsquare

Now, my reason for pointing out the above is this: I know which tool to buy to install it, but considering I'm trying to build tools as needed I'm wondering if anyone has such a tool and would be willing to send enough dimensions to duplicate it on this end.  If not I can reverse engineer a tool when I get the part.  But I was hoping to make it up and have it ready for when the part arrives in the mail.

Bob: When you were a lad, was it commonplace for the other lads to ride their bikes through a couple feet of water? ;)  I suppose though if you had an oiling point you could also blow the water out of the bearing when you were done having fun.... if you were the maintenance sort.  I considered looking for a new ball cage for the rusted away one, and cleaning it all up and reassembling but with the way I use a bike I can't see it lasting long before I have trouble again.  Sealed is definitely the way to go for me.  On the other hand, if its only sort of sealed it will probably let water in and keep it in there.  <sigh>

Next I'll be on to the rear axle, where I'm sure there will be some more tools required.

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